436 98. GRAMIFEJE. 



4. P. alpinum (L.) ; l.-sheaths inflated, pan. oblong, gl. trun- 

 cate glabrous ciliate on the back with a scabrous awn nearly 

 equalling their length, keel ciliate, upper sheath inflated. - 

 E. B. 519. P. 6. P. commutatum Gaud. Somewhat creeping. 

 St. 612 in. high. Wet alpine moors. P. VII. 



11. ALOPECTJ'RUS Linn. Fox-tail-grass. 



1. A. praten'sis (L.) ; st. ereot smooth, pan. cylindrical blunt, 

 gl. acute connected beloAV ciliate downy, pale equalling the 

 "flumes, awn projecting more tlian half its own lenc/th beyond the 

 pale.E. B. 759. $!. 8. 1. P. 4. Scarcely creeping. St. 13 

 feet high. In salt marshes the base of the st. becomes fleshy. 

 Upper sheath slightly inflated. Ligule short, blunt. Pan. 1 3 

 in. long, branches 4 6-flowered. Anth. yellow. Styles com- 

 bined. [A hybrid between this and Sp. 3 (A. In/bridus, Wimm.) has 

 been found in Wavwicksh. See J. ofB. xxxix. (1901) p. 232.] Rich 

 pastures. P. IV. VI. E. S. I. 



2. A. alpinus (Sm.) ; st. erect smooth, pan. oblong, gl. acute 

 connected below hairy, pale equalling the glumes, awn pro- 

 j voting ^ of its length beyond the pale. E. B. 1126. P. 4. 

 Somewhat creeping. St. decumbent at the base, then erect, 

 9 12 in. high. Ligule short, blunt. Uppermost 1. usually 

 (not always) short and broad, of the length of its inflated 

 sheath. Gl. connate through about J- of length. Awn from 

 about the middle of pale, sometimes wanting. Styles combined. 

 Pan. not exceeding an inch, sometimes rather lax ; silky branches 

 4 6-flowered. Hi^h on mountains. Loch-na-Gar. Cairn- 

 gorm mountains. Ben Lawers. Clova. P. VII. 



3. A. geniculdtus (L.) ; st. ascending bent at the knots smooth, 

 pan. cylindrical,^/, blunt connected below ciliate rather exceeding 

 the pale, awn from near the base of the pale and projecting half 

 its length beyond it, anth. linear. E. B. 1250. P. 5. Root 

 fibrous. St. about a foot long, branching below. Knots gene- 

 rally (in dry places) oval and fleshy. Upper sheath inflated. 

 Ligule oblong. Gl. membranous at the top except the midrib, 

 often villose or hairy below. Pale when laid open oblong, blunt, 

 slightly notched. Anth. ultimately violet-yellow. Styles mostly 

 combined. Pan. 1 2 in. long. A. promts (Mitten) 1 is a pros- 

 trate form of this. Wet places. P. VI. VII. E. S. I. 



1 Now known to have been a monstrosity, see J". of S. xxxvii. (1899) 

 p,358. H.&J.G, 



